Definitions for "B-horizon"
that layer of soil in a well-developed soil lying immediately below the A-horizon, and which contains deposits of organic matter leached from surface soils.
The soil horizon below the A-horizon where mineral and organic material is deposited that has been leached from the A-horizon. The B-horizon is also known as the "zone of accumulation" and is often rich in clay and red-brown in color due to the presence of limonite and hematite.
A layer in the soil, below the A-horizon, where materials leached from above accumulate. Typically enriched in clay and oxides.